Hydraulic nut integrated with wireless pressure measuring device

Abstract

A hydraulic nut integrating a wireless pressure measuring device is used for locking a disc scissor blade. A plunger hole and a pressure sensor mounting hole are tangentially formed along the circumference of the nut body. An annular groove is formed on one end face of the nut body, and a square groove is formed on one side of the other end face near the pressure sensor mounting hole, while an oil injection hole and a vent hole are formed on the other side. Oil holes are formed between the plunger hole and the annular groove, between the pressure sensor mounting hole and the annular groove, between the oil injection hole and the annular groove, and between the vent hole and the annular groove. This invention integrates a plunger pressurization assembly, a pressure ring thrust assembly, and a wireless pressure measuring assembly. A higher-precision pressure sensor is used to measure the pressure of the hydraulic nut, and after transmitting and receiving signals through the wireless pressure measuring assembly, the internal pressure data of the nut is displayed in real time on the display system. The locking status can be monitored in real time while the hydraulic nut is rotating at high speed without stopping the machine for observation, resulting in higher detection accuracy and reliability.

Description

Technical Field

[0001] This invention relates to the field of hydraulic locking technology, specifically a hydraulic nut in which a wireless pressure measuring device is integrated into the nut body. Background Technology

[0002] A hydraulic nut is an integrated hydraulic device that uses hydraulic pressure to lock a connected object. It transforms traditional torque locking into a new type of tension locking, greatly increasing the locking force of the nut. Therefore, hydraulic nuts can replace traditional nuts in applications requiring strong anti-loosening tightening, especially suitable for confined spaces where large wrenches cannot be used. However, traditional hydraulic nuts use mechanical indicators to display their internal pressure, which has low accuracy and cannot be monitored online. Therefore, in special conditions such as when the workpiece is rotating at high speed, if a pressure drop occurs and the locking force is insufficient, and this is not detected in time, it can seriously affect the service life of mechanical parts and even pose significant safety hazards. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention aims to provide a hydraulic nut with an integrated wireless pressure measuring device. The wireless pressure measuring device is integrated into the hydraulic nut body, which can collect pressure change data inside the hydraulic nut in real time and wirelessly transmit the data to a terminal display.

[0004] To achieve the above-mentioned objectives, the present invention provides three plunger holes for mounting plunger pressurization components and one pressure sensor mounting hole tangentially along the circumferential direction of the nut body of the hydraulic nut. An annular groove for mounting a pressure ring thrust component is formed on one end face of the nut body, and a square groove for mounting a wireless pressure measuring component is formed on one side of the other end face near the pressure sensor mounting hole. A threaded oil injection hole and an air vent hole are formed on the other side for mounting a grease injection and air vent component. Oil holes for oil circuit connection are formed between the plunger holes and the annular groove, between the pressure sensor mounting hole and the annular groove, between the oil injection hole and the annular groove, and between the air vent hole and the annular groove.

[0005] The adjusting screw of the plunger pressurization assembly is threaded into the plunger hole of the nut body. One end of the adjusting screw has an internal hexagonal groove for adjusting the plunger. The plunger and the plunger hole of the nut body are clearance-fitted. A plunger U-shaped sealing ring is installed between the plunger and the nut body. One end of the plunger is positioned by the bottom end face of the plunger hole, and the other end contacts the adjusting screw and is positioned by the end face of the safety block. The safety block, which limits the adjustment screw, is fixed to the groove at the front end of the plunger hole by a screw.

[0006] The pressure ring of the pressure ring thrust assembly is clearance-fitted with the annular groove of the nut body and sealed by a U-shaped sealing ring. An annular groove is opened in the outer diameter direction of the pressure ring, and an O-shaped strip is installed in the annular groove to prevent the pressure ring from slipping off the nut body during assembly.

[0007] The grease injection and venting assembly consists of a plug and a steel ball. The plug is threadedly connected to the nut body and sealed by the steel ball.

[0008] The pressure sensor of the wireless pressure measurement component is connected to the pressure sensor mounting hole of the nut body via a threaded connection and sealed by a sealing ring end face. The transmitter integrated circuit board and power module one are fixed to the square groove on the end face of the nut body by a power mounting bracket and screws. The transmitter integrated circuit board includes a pressure signal processing module, a control module one, and a wireless transmission module. Both the pressure sensor and the transmitter integrated circuit board are powered by power module one. The receiver integrated circuit board includes a wireless receiving module, a control module two, and a wired communication module. The receiver integrated circuit board is powered by power module two. The display system directly displays real-time pressure data. When the pressure value is outside the working pressure range of the nut, the alarm system is activated.

[0009] The hydraulic nut of this invention integrates a plunger pressurization assembly, a pressure ring thrust assembly, and a wireless pressure measurement assembly. The plunger pressurization assembly is used to pressurize the inside of the hydraulic nut, the pressure ring thrust assembly is used to provide thrust to lock the disc cutter, and the wireless pressure measurement assembly is used to collect the pressure data inside the hydraulic nut and wirelessly transmit the data to a signal receiver. Finally, the pressure data is displayed on the terminal display system through a wired communication module, realizing real-time monitoring of the internal pressure of the hydraulic nut during equipment operation.

[0010] Compared with existing technologies, this invention uses a higher-precision pressure sensor to measure the pressure of the hydraulic nut. The signal is sent through a pressure signal processing module, a control module one, and a wireless transmission module, and received through a wireless receiving module and a control module two. Finally, the pressure data inside the nut is displayed in real time on the display system through a wired communication module. The locking status can be monitored in real time when the hydraulic nut is rotating at high speed without stopping the machine for observation, resulting in higher detection accuracy and reliability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the usage state of the present invention.

[0012] Figure 2 This is a schematic diagram of the structure of the present invention.

[0013] Figure 3 yes Figure 2 Section II.

[0014] Figure 4 yes Figure 2 Electrical connection block diagram of the wireless pressure measurement component.

[0015] In the diagram: 1. Disc shear shaft; 2. Hydraulic nut; 3. Spacer; 4. Disc cutter; 5. Rubber-coated gasket; 6. Nut body; 7. Piston; 8. Piston U-shaped seal ring; 9. Pressure adjusting screw; 10. Safety block; 11. Pressure sensor; 12. Plug; 13. Steel ball; 14. Pressure ring U-shaped seal ring; 15. O-shaped strip; 16. Pressure ring; 17. Power module one; 18. Power supply bracket; 19. Transmitter integrated circuit board; 20. Plastic cover plate; 21. Pressure signal processing module; 22. Control module one; 23. Wireless transmission module; 24. Receiver integrated circuit board; 25. Wireless receiving module; 26. Control module two; 27. Power module two; 28. Wired communication module; 29. ​​Display system; 30. Alarm system. Detailed Implementation

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this invention, based on the structure of a traditional closed hydraulic nut, eliminates the mechanical indicator rod assembly and replaces it with a wireless pressure measuring assembly. The hydraulic nut 2 is mounted on a disc shear shaft 1, and a spacer 3, a disc cutter 4, and a rubber-coated gasket 5 are sequentially mounted on the rear side of the hydraulic nut 2. The hydraulic nut 2 includes a nut body 6, a plunger pressurization assembly, a pressure ring thrust assembly, a grease injection and venting assembly, and a wireless pressure measuring assembly.

[0017] Nut body 6: An annular groove is formed on one end face of the nut body 6 for engaging with the pressure ring 16 and sealing it with the pressure ring U-shaped sealing ring 14; a square groove is formed on one side of the other end face for fixing the power module 17 and the transmitter integrated circuit board 19 with the power mounting bracket 18, and a plastic cover plate 20 is installed on the top of the transmitter integrated circuit board 19 to protect the transmitter integrated circuit board 19 and prevent signal interruption; a grease injection hole and a vent hole are formed on the other side of the other end face, which engage with the plug 12 respectively for grease injection and venting of the hydraulic nut 2 during assembly, and are sealed by the steel ball 13 after grease injection and venting; three plunger holes with threaded holes at the top and one pressure sensor mounting hole with threaded holes at the bottom are formed in the circumferential direction of the hydraulic nut 2, for installing the plunger pressurization assembly and the pressure sensor 11 respectively; oil holes for oil circuit connection are formed between the plunger holes and the annular groove, between the pressure sensor mounting hole and the annular groove, between the oil injection hole and the annular groove, and between the vent hole and the annular groove.

[0018] The plunger pressurization assembly consists of an adjusting screw 9, a plunger 7, a plunger U-shaped sealing ring 8, and a safety block 10. The adjusting screw 9 is threaded into the plunger hole of the nut body 6. One end of the adjusting screw 9 has an internal hexagonal groove, which allows adjustment of the plunger 7. The plunger 7 is fitted with the plunger hole with a small clearance and is sealed by the plunger U-shaped sealing ring 8. One end of the plunger 7 is positioned by the bottom end face of the plunger hole, and the other end contacts the adjusting screw 9 and is positioned by the end face of the safety block 10. The safety block 10, which limits the adjustment screw 9, is fixed to the groove at the front end of the plunger hole by a screw.

[0019] The pressure ring thrust assembly consists of a pressure ring 16, an O-shaped strip 15, and a pressure ring U-shaped sealing ring 14. The pressure ring 16 and the annular groove of the nut body 6 are fitted with a small clearance and sealed by the pressure ring U-shaped sealing ring 14. An annular groove is formed on the outer diameter of the pressure ring 16, and an O-shaped strip 15 is installed inside the annular groove to prevent the pressure ring 16 from slipping off the nut body 6 during assembly.

[0020] Wireless pressure measurement component: The pressure sensor 11 is connected to the pressure sensor mounting hole of the nut body 6 by a thread and sealed by a sealing ring end face; the transmitter integrated circuit board 19 and the power module 17 are fixed to the square groove on the end face of the nut body 6 by a power fixing bracket 18 and screws. The transmitter integrated circuit board 19 includes a pressure signal processing module 21, a control module 1 22 and a wireless transmission module 23. The pressure sensor 11 and the transmitter integrated circuit board 19 are both powered by the power module 1 17; the receiver integrated circuit board 24 includes a wireless receiving module 25, a control module 26 and a wired communication module 28. The receiver integrated circuit board 24 is powered by the power module 2 27; the display system 29 can directly display real-time pressure data. When the pressure value is not within the working pressure range of the nut, the alarm system 30 is activated.

[0021] The locking and pressure testing process of the hydraulic nut 2 of this invention is as follows:

[0022] 1. Before installing the hydraulic nut 2, first loosen the pressure adjusting screw 9 to the end face position of the safety block 10, but do not exceed the end face, and then reset the pressure ring 16 to be flush with the end face of the hydraulic nut 2.

[0023] 2. During installation, after screwing the hydraulic nut 2 onto the disc shear shaft 1 using the lever, leave an appropriate gap between the pressure ring 16 and the spacer 3, typically about 0.2 to 0.5 mm;

[0024] 3. When pressurizing, rotate the pressure adjusting screw 9 clockwise with an Allen wrench. The three plungers 7 must be pressurized evenly to generate pressure in the cavity of the hydraulic nut 2. The grease is compressed, pushing the pressure ring 16 to move axially, which in turn pushes the spacer 3 to lock the disc cutter 4 onto the disc shear shaft 1.

[0025] 4. During the pressurization process, carefully observe the real-time pressure data on the display. Stop pressurizing when the actual pressure reaches the required working pressure.

[0026] 5. During equipment operation, the pressure data of the hydraulic nut 2 can be monitored in real time through the display. Once the pressure data exceeds or falls below the set working pressure, an alarm mechanism will be triggered, and the equipment will be stopped in time through the control system, eliminating the safety hazards of the equipment.

Claims

1. A hydraulic nut integrating a wireless pressure measuring device, characterized in that: Three plunger holes for installing plunger pressurization components and one pressure sensor mounting hole are tangentially opened along the circumference of the nut body (6) of the hydraulic nut (2). An annular groove for installing the pressure ring thrust component is opened on one end face of the nut body (6). A square groove for installing the wireless pressure measuring component is opened on one side of the other end face near the pressure sensor mounting hole. An oil injection hole and an exhaust hole with threads are opened on the other side for installing the grease injection and exhaust components. Oil holes for oil circuit connection are opened between the plunger holes and the annular groove, between the pressure sensor mounting hole and the annular groove, between the oil injection hole and the annular groove, and between the exhaust hole and the annular groove. The adjusting screw (9) of the plunger pressurization assembly is engaged with the front end of the plunger hole of the nut body (6) through a threaded hole. One end of the adjusting screw (9) has an internal hexagonal groove for adjusting the plunger (7). The plunger (7) is clearance-fitted with the plunger hole of the nut body (6). A plunger U-shaped sealing ring (8) is installed between the plunger (7) and the nut body (6). One end of the plunger (7) is positioned through the bottom end face of the plunger hole, and the other end is in contact with the adjusting screw (9) and positioned through the end face of the safety block (10). The safety block (10), which limits the adjustment screw (9), is fixed to the groove at the front end of the plunger hole by a screw. The pressure ring (16) of the pressure ring thrust assembly is fitted with a clearance between the annular groove of the nut body (6) and sealed by the pressure ring U-shaped sealing ring (14). An annular groove is opened in the outer diameter direction of the pressure ring (16), and an O-shaped strip (15) is installed in the annular groove to prevent the pressure ring (16) from slipping off the nut body (6) during the assembly process. The grease injection and venting assembly consists of a plug (12) and a steel ball (13). The plug (12) is threadedly connected to the nut body (6) and sealed by the steel ball (13). The pressure sensor (11) of the wireless pressure measuring component is connected to the pressure sensor mounting hole of the nut body (6) by a thread and sealed by a sealing ring end face. The transmitter integrated circuit board (19) and the power module one (17) are fixed to the square groove on the end face of the nut body (6) by a power fixing bracket (18) and screws. The transmitter integrated circuit board (19) includes a pressure signal processing module (21), a control module one (22) and a wireless transmission module (23). The pressure sensor (11) and the transmitter integrated circuit board (19) are both powered by the power module one (17). The receiver integrated circuit board (24) includes a wireless receiving module (25), a control module two (26) and a wired communication module (28). The receiver integrated circuit board (24) is powered by the power module two (27). The display system (29) directly displays the real-time pressure data. When the pressure value is not within the working pressure range of the nut, the alarm system (30) is activated. The tightening and pressure testing process of the hydraulic nut (2) is as follows: i. Before installing the hydraulic nut (2), first loosen the pressure adjusting screw (9) to the end face position of the safety block (10), but do not exceed the end face, and then reset the pressure ring (16) to be flush with the end face of the hydraulic nut (2); ii. During installation, after screwing the hydraulic nut (2) onto the disc shear shaft (1) using the lever, leave an appropriate gap of 0.2 to 0.5 mm between the pressure ring (16) and the spacer (3); iii. When pressurizing, rotate the pressure adjusting screw (9) clockwise with an Allen wrench. The three plungers (7) pressurize evenly, so that pressure is generated in the cavity of the hydraulic nut (2). The grease is compressed, pushing the pressure ring (16) to move axially, and then pushing the septum (3) to lock the disc cutter (4) on the disc shear shaft (1). iv. During the pressurization process, carefully observe the real-time pressure data on the display. Stop pressurizing when the actual pressure reaches the required working pressure. v. Hydraulic Nut (2) During the operation of the equipment, the pressure data on the display is monitored in real time. Once the pressure data exceeds or falls below the set working pressure, an alarm mechanism will be triggered, and the equipment will be stopped in time through the control system to eliminate potential safety hazards.

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